Marker Properties Dialog
Lets you edit a marker's properties.

Time code value of the marker.
You can edit the time value manually or by using the small buttons below for seconds and milliseconds. You can set the playhead time by clicking on (If the Video Preview window is open, a seek operation is performed, which may not succeed; the exact time that can be seeked depends on the key frame time codes in the preview video).
Label text of the marker.